NAME

glxsb - Geode LX Security Block crypto accelerator

SYNOPSIS

To compile this driver into the kernel, place the following lines in your
kernel configuration file:
devicecryptodeviceglxsb
Alternatively, to load the driver as a module at boot time, place the
following line in loader.conf(5):
glxsb_load="YES"

DESCRIPTION

The glxsb driver supports the security block of the Geode LX series
processors. The Geode LX is a member of the AMD Geode family of
integrated x86 system chips.
Driven by periodic checks for available data from the generator, glxsb
supplies entropy to the random(4) driver for common usage.
glxsb also supports acceleration of AES-128-CBC operations for crypto(4).
It also registers itself to accelerate other HMAC algorithms, although
there is no hardware acceleration for those algorithms. This is only
needed so glxsb can work with ipsec(4).

CAVEAT

The crypto(9) framework will fail to open the crypto session on the
device if the AES key’s length is != 128 bits. This prevents the use of
the glxsb device driver with AES keys of length != 128 bits.